Improvement in scythe-rifles



UNITED STATES PATENT OFFICE.

THOMAS J. MAYALL, OF ROXBURY, MASSACHUSETTS.

IMPROVEMENT IN SCYTHE-RIFLES.

Specification forming part of Letters Patent No. 26,197, dated November' 22, 1859.

To @ZZ whom, it may concern,.-

Be it known that I, THOMAS J. MAYALL, of Roxbury, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in the Manufacture of Rifles Used for Sharpening Scytlies, tbc.; and I do hereby declare that the following description, taken in connection with the aoco rnpanying drawings, hereinafter referred to, forms a full and exact specification of the same, wherein I have set forth the nature and principles of my said improvem ents, by which my invention may be distinguished from all others of a similar class, together with such parts as I claim and desire to have secured to me by Letters Patent.

The figures of the accompanying plate ,of drawings represent my improvements.

Figure l is a plan or top View of my improved rifle. Fig. 2 is a central longitudinal vertical section of the same. Figs. 3 and #l are sectional views showing the molds.

The object of my improvements is to form a ride for sharpening scythes, tbc., which shall be cheaper and more durable than those heretofore manufactured. I accomplish these results by making the rifie of india-rubber or gutta-percha, combined with emery, sand, or other gritty materials, and sulphur compounded in any desired proportions.

I make a composition of about the following proportions, viz: Fifteen pounds of emery, sand, or other gritty materials, one pound of rubber or gutta-percha, and five ounces of sul phur. These ingredients are perfectly combined and mixed together, and the composition thus forlned is then placed in metallic molds a ct b b, subjected to pressure, and heated from fifteen minutes to four hours at a temperature of from 260 to 300 Fahrenheit, much loss time being required when a high pressure is used than when a low pressure only is obtained. This composition thus becomes hard and durable. The handle c can be formed in the molds of hard-gum compound at the same time with the above-named composition, or of Wood, metal, or other suitable material, and both the inner body and handle of the rifle may be of other substances than the composition above named, the sharpening composition being formed in sufficient thickness upon the said inner body in the molds.

The composition above stated and the degree of heat to be employed admit of many variations, and therefore I donot limit myself to the proportions or to the degree of heat to be employed.

Having thus described my improvements, what I claim as my invention, and desire to have secured to me by Letters Patent, is-

As a new article of manufacture, a rifle for sharpening scythes, duc., formed of india-rubber or gutta-percha, with which emery, sand, or other suitable gritty substances are incorporated, substantially as set forth.

THOS. J. MAYALL. Witnesses:

J osEPH GAVETT, ALBERT W. BROWN. 

